Kneafsey, J. T. (1974). The economics of the transportation firm. Washington: Lexington Books.
Dyfyniad Arddull ChicagoKneafsey, James T. The Economics of the Transportation Firm. Washington: Lexington Books, 1974.
Dyfyniad MLAKneafsey, James T. The Economics of the Transportation Firm. Washington: Lexington Books, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.